I always hand wash mine. First in a coolish soapy wash in the sink followed by a hotter wash (also by hand) then a really good rinse, to which I add a whitening stuff, the name of which escapes me at the moment but I'm sure it's made by Dylon, net whitener or some such it's called, ( I use Biotex for the first wash, then an ordinary handwash powder) I don't spin the nets either but I hang them out to drip on the line, they seldom take long to dry if the weather is good, and I just rehang them - no need to iron.